Reflective Pixel Pattern Micro-Slits for Higher Contrast Displays
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Solution Overview
Problem
Reflective display panels face issues with light leakage and poor display contrast due to manufacturing process factors, particularly in dark-state modes, which are exacerbated by high reflectivity materials used to enhance reflection efficiency.
Innovation Solution
The display panel incorporates reflective patterns divided by micro-slits, arranged in specific directions and spacings to reduce reflection area and minimize light leakage, thereby improving display contrast and brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the reflective layer is made of high reflectivity metal material and its distribution range is increased, then reflection efficiency is improved, but light leakage problem is highlighted resulting in poor display contrast
Solution Approach 1:
The reflective layer is segmented into multiple reflective patterns with micro-slits, dividing the continuous metal layer into discrete regions. This segmentation reduces light leakage between adjacent pixels while maintaining overall reflectivity, as the micro-slits create isolation barriers that prevent unwanted light transmission in dark-state mode
Solution Approach 2:
Different regions of the reflective layer are designed with varying properties - the reflective patterns provide high reflectivity in display areas, while the micro-slits provide light-blocking properties in non-display areas. This local differentiation allows each region to perform its specific function optimally without compromising the other
2Use of energy by moving object
If the reflective layer distribution range is increased to maximize reflection, then energy consumption is reduced, but manufacturing precision requirements increase due to light leakage sensitivity
Solution Approach 1:
Dividing the reflective layer into segmented patterns with micro-slits provides manufacturing tolerance buffer zones. The micro-slits act as isolation features that prevent light leakage even when manufacturing variations occur, reducing the stringency of precision requirements compared to a continuous reflective layer
Solution Approach 2:
The micro-slits serve as intermediary elements between adjacent reflective patterns, providing a buffer zone that mitigates the impact of manufacturing variations. These intermediary structures prevent direct optical interaction between adjacent pixels, reducing sensitivity to positioning precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The micro-slit design effectively reduces dark-state brightness and enhances display contrast and brightness uniformity without significantly affecting overall reflectivity.
Implementation Method 1
the reflective patterns are respectively arranged at intervals along a first direction and a second direction... Each of the reflective patterns has a first side edge and a second side edge arranged along the first direction. The micro-slits include a plurality of first micro-slits whose extension direction is parallel to the first direction.
Data Source
AI summary
A display panel including a first substrate, a second substrate, a plurality of pixel structures and a liquid crystal layer is provided. The first substrate and the second substrate are overlapped with each other. The pixel structures are disposed on the first substrate and respectively provided with a plurality of reflective patterns. Each of the reflective patterns is divided into a plurality of reflective portions by a plurality of micro-slits. The reflective portions are connected to each other. The liquid crystal layer is disposed between the first substrate and the second substrate.